Lambro Industries 351GR Round Plastic Wall Cap 6 Inches

Product Description

The LAMBRO INDUSTRIES 351GR is a 6-inch round plastic wall cap designed to terminate residential exhaust duct runs at exterior wall penetrations. The cap features a damper that is spring controlled, keeping the vent closed when the exhaust fan or dryer is not in operation and opening under airflow pressure. This prevents backdrafts, pests, and weather infiltration. The gray finish accepts standard exterior paint, allowing the cap to blend with most siding colors. It ships individually boxed and is a common component in bathroom exhaust, dryer, and kitchen ventilation systems.

This wall cap is suited for residential applications where a 6-inch round duct terminates through an exterior wall. Typical install scenarios include dryer exhaust, bathroom fan exhaust, and range hood lateral duct runs. The spring-controlled damper makes it appropriate for low-static exhaust systems where a gravity flap may not seal reliably. HVAC technicians, sheet metal installers, and general contractors routinely spec this type of cap on new construction and retrofit ventilation projects.

Key Features

• 6-inch round opening fits standard 6-inch round exhaust duct
• Spring-controlled damper closes automatically when system is off
• Gray plastic construction resists corrosion and moisture
• Paintable surface compatible with standard exterior paints
• Individually boxed for clean jobsite handling

Compatibility

Designed as an OEM-style replacement or new-install wall termination cap for residential exhaust duct systems using 6-inch round duct.

Installation Notes

Installation is typically performed by HVAC technicians or general contractors during rough-in or finish work. Power down the exhaust fan or appliance and confirm the duct run is clear before mounting the cap at the exterior wall penetration. Seal around the cap flange with appropriate exterior caulk to prevent water infiltration per local building code requirements. Do not obstruct the damper swing after installation.

Technical Specifications

• Duct Size: 6 inches
• Shape: Round
• Material: Plastic
• Color: Gray
• Damper Type: Spring Controlled
• Weight: 1 pound
• Package Quantity: 1

Standard Information

• Brand: LAMBRO INDUSTRIES
• Manufacturer Part Number: 351GR